Sensor array imaging in a randomly scattering medium is usually limited because coherent signals recorded by the array and coming from a reflector to be imaged are weak and dominated by incoherent signals coming from multiple scattering by the medium. We will see in this talk how correlation-based imaging techniques can mitigate or even sometimes benefit from the multiple scattering of waves. We will clarify the relations between time reversal experiments, active sensor imaging using migration or backpropagation of the array data set, and passive sensor imaging using cross correlations of ambient noise signals.
LMA - Laboratoire de Mécanique et d’Acoustique
J. Garnier - Correlation-based imaging in random media
Salle J. Perès, Bât. C
Le 5 novembre 2013 de 11h00 à 12h00
Josselin Garnier, Laboratoire de Probabilités et Modèles Aléatoires & Laboratoire Jacques-Louis Lions - Université Paris Diderot
Voir en ligne : Page personnelle de Josselin Garnier
